Machine for making cartridge-shells



L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS Patented Sept. 7, 192%,

5 SHEETSSHEET I.

APPLICATION FILED APR. 6, I918.

LE H001: er,

' I anionic L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS.

APPLICAITION FILED APR. 6, 1918.

5 SHEETS-SHEET 2.

- vwemtoz Ima 4g LEJfoo/tefl @atemease tf7,1920..

L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS."

0. 2. 93 m lum b m .dw M5 ow P m A m N 0 H A m H P A A1 9 1 9 2 5 n0 91i Qvuwwlioz LE. 'Jfooker, f

L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS.

APPLICATION FILED APR. 5, 191.8. I l I Patented Sept. 7, 1920.

v 5 SHEETSSHEET 4.

w L- E. Hacker,

L. E. HOOKER.

MACHINE FOR MAKING CARTRIDGE SHELLS.

PPLICATION FILED AP Patented'Sept. 7,1920.

5SHEE TS SHEET 5- I 7 IE. Hook e7",

. V '15.. 1 x agrflfrlll {UNITED STATES" PAT or LOWELL, MASSACHUSETTS.

LESLIE E. noqxiin,

\ macnrnn For, MAKING CARTRIDGE-SHELLS.

Specification of Letters Patent. Patented Sept. 7, 1920- j Q pApplication filed April 6, 1918. Serial No. 227,026.

To all whom it may concern; I

Be it lmown that I, LESLIE E. HOOKER, a citizen of the United States,res'ding at Lowell, in the county of Middlesex and 5 State ofMassachusetts, have invented new and useful Improvements in Machinesforv Making Cartridge-Shells, of which the following is a specification.Y My invention relates to the manufacture of small cartridge shells, orother small closed-end tubes, by the method of extrusion which forms thesubject' matter of my prior Patent N 0. 922,585, of May 25, 1909.

' It consists in certain improvements which I have made to the machinefor carrying out the said method, which machine forms the subject matterof my prior Patent No.

a 918,154, of April 13, 190

As far as the actual extruding operation 0 is concerned, the meansemployed does not differ from that disclosed in my last-mentioned priorpatent, that is to say, the die and punches are the same, the presentimprovements relating to'the automatic feed 5 of the blanks and theautomatic shifting of the punches in time With the strokes of the"pos1tion.

4O punch and one trimming punch, which worked alternately in each diebut, in the present machine, only one die is used with one extruding.and one trimming punch, said punches being carried by a slide which 5reciprocates horizontally on the lower end of the press plunger so as tobringsaid punches alternately in line with the die at each down strokeof the plunger- To increase the output of the machine and to em v 0 ableit to extrude a tube at each down stroke, two slides are provided, eachcarrying a pair of punches, and two dies, one slide moving forwardlywhile the other is moving backwardly. The blanks are fed, by

5 any desired automatic feeding mechanism, successively into a pocketlocated at the hind the extruding the die on the blank which it pickedup punches in the other slide alternate those of the punches stated.The'cup-shaped blank are previ ously given a quasi-polygonal internalshapebe picked up with cer-- same distance from thedie toward the frontas the distance of the trimming punch beup by the extruding punch on thesame stroke of the plunger as that on which they trimming punch acts,while, on the next stroke, 'the trimming punch is idle and the extrudingpunch performs its operation in on the with in the first slide, as

the previous stroke. The operations so that they will tainty and beaccurately centered onthe extruding punch.

With this preliminary general statement of the operation of the machine,it will now be described specifically with reference to the accompanyingdrawings, in which,

Figure 1 is a longitudinal sectional view through one of the dies andthe correspond ing punch slide, showing the blank feeding means and theslide operating means, the slide belng 1n its most advanced and lowestFig. 2 is a similar View showing the slide in its highest position.

Fig. 3 is a similar view showing the slide in its most retracted andlowest position.

Fig. 4 is a plan view of the die-plate and blank feeding means. i Fig. 5is a plan view of one ofthe cupshaped blanks. a?

. Fig. 6 is a vertical section of the same. 1

Fig.7 is a view similar to Fig. 1 but on a larger scale and showing thepunches and blank in section- Fig. 8 is a view similar to Fig. 3, but ona larger scale and'showing the punches and blank in section, theblank-feeding and the slide-operating means being omitted in the lasttwo views, and 1 Fig. 9 is a front end view of the essential' parts ofthe machine.

The machine employed is an ordinary straight-side dieshaping press,modified to enable it to perform the desired operations. 1 representsthe anvil or bed-plate and 2. the reciprocating head or plunger, 3representing the connecting-rod running to the crankshaft 4, journaledinthe standards 5, between which the plunger is guided, as usual. On theanvil 1 is mounted the die-plate 6 and on the latter the die-holder 7,containsN'r punch, and are picked ing the dies 8, which comprise thebushings if 9 and are similar in everrespect to the dies' of the machineof my "are successively atent No. 918,154 aforesaid. The die-holder 7also contains the yielding blocks 10, which constitute the bottoms ofthe pockets into which the blanks fed and from which they arepicked up ythe extruding punches, as will be descrlbed. 1 a

- Slidably mounted inhorizontal guides 11,

secured to thebottom of the plunger 2, are

' the punch-carrying slides 12, each having with the strokes of theplunger, by cams 24,

one extruding punch 13 and one trimming punch 14. As in my prior machinepatent, the extruding unch consists of a former 15 and a surroundingextruding sleeve 16.

The slides 12 are reciprocated in time fast on the cam-shaft 21,journaled in brackets 20, bolted to the standards 5,, andcarrying asprocket wheel 22, driven from the crank-shaft 4 by a chain 23; thediameters of the sprocket wheels on the cam-shaft and crank-shaft are soselected that'the crank shaft turns twice as fast as the cam-shaft. Eachslide is formed at its rear end into a ,rectan ular yoke 17, provided onits inner vertica faces with wear plates 18, 18, the latter beingadjustable to take up wear by means of the wedge-shaped backing piece19.

The active face of the cam is an arc the picking up from the die whilethe extruding punch picks up the next blank.

A blank is illustrated in Figs. 5 and 6 at 25; it forms the subiectmatter of my gpplication for patent fi ed April 10,1918 er. No. 227,690.It has a plurality of equally-spaced flattened surfaces 26, which areconnected by arcs 27 of the original internal periphery. The extrudingpunch, in' the blank, contacts, of course,

only with sald surfaces with w ich it firmly engages and which act tocenter the blank upon the'punch so thatlit will be properly I- presentedto the die.

' The blanks are fed to the point where they are picked up. by the punchby a suitable feeding mechanism, comprising as. shown a rotating dialplate 28, partially surrounded by a fixed wall 29 and lying beneathfixed guides 30 and 3.1, by which the blanks, which may be placed on thedial plate by hand but are preferably automatically fed thereto by oneof thewell known blank feed mechanisms, are guided into and along theguideways 32 until they arrive successively in the pockets 38, composedof the stop-plates 33, mounted on the die-holder 7, the endpiece 34 ofthe guides 31, and the spring fingers 35. The bottom of the pocket 38consists of the yielding block 10, above mentioned, slidably mounted inthe bushing 36 and pressed upwardly by the spring 37, its upwardmovement being limlted by a shoulder on the block contacting with thebottom of the bushing, the opening in which is slightly smaller thanthat in the die-plate. These yielding bottoms tov the pockets preventreakage in case the ends" of the cup-shaped blanks vary in thickness.The dle-holder 7 is providedwith an opening 39 to receive the trimmingpunch during its idle stroke, as shown in 1g. 3.

The operation can be understood from what precedes but may be brieflyrestated as follows;

y The plunger descends with one of the slides 12 in the forward positionof Fig. 1;

the extruding punch enters the blank" which has been fed into the pocket38 while the trimming punch clears the previously extruded tube 40 fromthe die; the plunger rises and descends again with the slide in therearward position of Fig. 2; the extruding punch carries the blank intothe die and extrudes it into the tube 40, while the trimming punchpasses idly into the opening 39. The operations of'the punches in theother slide alternate with those described.

Having thus described my invention, what I claim is: 1. A machine forextruding tubes from cup-shaped blanks, comprising the combination, withthe die-holder and reciprocating plunger, of a slide guided on thebottom of the plunger, a cam for reciprocating said slide,- means todrive said cam in timed relation with the plunger, an extruding punchand a trimmin' punch carried by said slide, a die mounte in saiddie-holder, and a pocketinto which the blanks are fed successively andfrom which they are lifted by the extruding punch.

2. In the machine .of claim 1., the dieholder containing two dies, apunch carrying slide for each die, and a cam for each slide, a shaft onwhich the cams are mounted, driving connections to said shaft from thecrank-shaft which reciprocates the plunger such that the cam-shaft makesone half 'as many rotations as the crank-shaft, and

the two cams being set 180 apart, whereby, at each down stroke of theplunger, a tube is extruded, another is freed from the die, and a blankis picked up.

3. In a machine of the class described,

the combination with a fixed die and a reciprocating punch, ofapositioning stop for the blanks to be operated on, and means to move thepunch laterally to its reciprocating m'otlon, so that it alternatelydescends in positioned by said stop.

4. In a machine of the class described, the combination of a die-plate,a dieiheld 5 thereon and a blank positioning stop fixed with relation tosaiddie, a reciprocating plunger and a punch carried thereby, and meansto move said punch on said plunger line with the die' and in line with ablank at 'right angles to its reciprocating movement, whereby the punchdescends alter- 1o nately in line with said die and with saidblank-positioning stop.

. In testimony whereof I have hereunto set my hand.

LESLIE E. HOOKER.

